The correct answer is: a) Kynshi River.
The Kynshi River is a river in Meghalaya, India. It is the longest river in the state, and is a major tributary of the Brahmaputra River. The Kynshi River is known for its scenic beauty, and is a popular tourist destination. The Nohkalikai Falls, the highest plunge waterfall in India, is located on the Kynshi River.
The Myntdu River is a river in Meghalaya, India. It is a tributary of the Kynshi River. The Myntdu River is known for its white-water rafting opportunities.
The Umiam River is a river in Meghalaya, India. It is a reservoir formed by the construction of the Umiam Dam. The Umiam River is a popular tourist destination, and is home to a variety of fish species.
The Simseng River is a river in Meghalaya, India. It is a tributary of the Kynshi River. The Simseng River is known for its scenic beauty, and is a popular tourist destination.